Abstract:
Bahamas Benthic Foraminiferal Isotope Data Calibration to VPDB The data are presented with respect to VPDB based on an published values for NBS-19 of -2.20 for 18O and 1.95 for 13C. Since they were first published, we have undertaken an extensive intercalibration of our laboratory with a large segment of the paleoceanography research community. The results of this intercalibration are ... published and available from the WDC for Paleoclimatology: Ostermann, D. R. and W. B. Curry, Calibration of stable isotope data: An enriched 18O standard used for source gas mixing detection and correction, Paleoceanography, v. 15, pp. 353-360, 2000.

As a result of this intercalibration, we discovered that our original data needed a small revision. Thus we provide here both the original data as published, and the revised data based on our further evaluations of mass spectrometer performance. The differences between the data sets are small (<0.05 permil for 13C and ~0.1 permil for 18O), but large enough to warrant recalculation. The corrections are also dependent on sample size and isotopic composition, so it is not possible to subtract a constant from the original to obtain the revised data. It is this revised data that we recommend be used by individuals interested in this data.

The revised data also contain about 600 more data points than when originally published - they are included in the revised data as well.

The data were added to in several subsequent publications; the data for these contributions are generally available elsewhere, but some is included in the revised file here called "lbb.revised.data.txt":